import Data.List (transpose)

modulo = 10 ^ 9 + 7

period = 2 * (modulo + 1) `div` 3

fib_mat :: [[Int]]
fib_mat = [[1, 1], [1, 0]]

initial_vector :: [[Int]]
initial_vector = [[0], [1]]

multiply :: (Integral a) => [[a]] -> [[a]] -> a -> [[a]]
multiply a b mo = map (\r -> map ((`mod` mo) . sum . zipWith (*) r) b') a
  where
    b' = transpose b

expt :: [[Int]] -> Int -> Int -> [[Int]]
expt = expt' [[1, 0], [0, 1]]
  where
    expt' a _ 0 _ = a
    expt' a b n mo
      | n `mod` 2 == 1 = expt' (multiply a b mo) b' n' mo
      | otherwise = expt' a b' n' mo
      where
        n' = n `div` 2
        b' = multiply b b mo

main = do
  n <- readLn
  let ([an]:_) = multiply (expt fib_mat n period) initial_vector period
      ([bn]:_) = multiply (expt fib_mat an modulo) initial_vector modulo
  print bn